643764-86-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 643764-86-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,3,7,6 and 4 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 643764-86:
(8*6)+(7*4)+(6*3)+(5*7)+(4*6)+(3*4)+(2*8)+(1*6)=187
187 % 10 = 7
So 643764-86-7 is a valid CAS Registry Number.